Three differences I see in your working scenario and the one I'm having trouble with:
1) OS Platform: Windows vs. mine is Linux
2) DevTest Version: 9.1 vs. mine is 8.2
3) Paths: .tst/.config/staging not all present under .tst path
If I use Postman and just specify path to .tst, the error changes to: Failed to successfully create the archive. further down it lists filenotfound: /apps/Lisa8.2.0/tests/TIBCO/MWCoreApi/BillingArrangementResource/lisa.project (No such file or directory), which is true, that's not where the config lives and it is a different name.
Below are the paths and error I see:
<?xml version="1.0" encoding="UTF-8"?>
<invokeResult>
<method name="RunTest">
<params>
<param name="stagingDocPath" value="/apps/Lisa8.2.0/StagingDocs/Run1User1Cycle.stg" />
<param name="coordName" value="Coordinator" />
<param name="configPath" value="/apps/Lisa8.2.0/Configs/DIT_Environment.config" />
<param name="testCasePath" value="/apps/Lisa8.2.0/tests/TIBCO/MWCoreApi/BillingArrangementResource/CoreAPI_Automation_BillingArrangement.tst" />
<param name="callbackKey" value="7D5CD27E277911E6AAE20050568E772A" />
</params>
</method>
<status>ERROR</status>
<result>
<message>An error occured in 'runTest'. Message: The configuration is not part of the same project as the test case.
Test Case: /apps/Lisa8.2.0/tests/TIBCO/MWCoreApi/BillingArrangementResource/CoreAPI_Automation_BillingArrangement.tst
Configuration: /apps/Lisa8.2.0/Configs/DIT_Environment.config
Stack: java.lang.IllegalArgumentException: The configuration is not part of the same project as the test case.
Test Case: /apps/Lisa8.2.0/tests/TIBCO/MWCoreApi/BillingArrangementResource/CoreAPI_Automation_BillingArrangement.tst
Configuration: /apps/Lisa8.2.0/Configs/DIT_Environment.config